;ref: https://fedoramagazine.org/automate-backups-with-restic-and-systemd/

[Unit]
Description=Restic backup service

[Service]
Type=oneshot
ExecStart=restic backup \
  --verbose \
  --one-file-system \
  --tag systemd.timer \
  $BACKUP_EXCLUDES $BACKUP_PATHS
ExecStartPost=restic forget \
  --verbose \
  --tag systemd.timer \
  --group-by "paths,tags" \
  --keep-daily $RETENTION_DAYS \
  --keep-weekly $RETENTION_WEEKS \
  --keep-monthly $RETENTION_MONTHS \
  --keep-yearly $RETENTION_YEARS
EnvironmentFile=%h/.config/restic/othalan.env